Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
ætren
←
Old English
ātor
(suffix)
←
Old English
en
(suffix)
←
Proto-West Germanic
*ait(t)rīn
(inherited)